Metalmorph

 This card has an advanced counterpart known as Rare Metalmorph.

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In the Premium Pack Alternate Art print of this card, the armor has two pairs of eyes while the old artwork only had one; its claws and shape are different. This card was also misprinted as a Continuous Trap Card.

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In Yu-Gi-Oh! The Sacred Cards and Yu-Gi-Oh! Forbidden Memories, this card is a Spell Card.

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OCG Rulings

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The "Target 1 face-up monster on the field; equip this card to that target. It gains 300 ATK and DEF." effect is applied when "Metalmorph" is activated. (It targets.): Metalmorph

The "If it attacks, it gains ATK equal to half the ATK of the attack target, during damage calculation only." effect is applied after it is treated as an Equip Card. (It does not start a Chain Link.)

If you equip multiple "Metalmorph" on the same monster, both the "It gains 300 ATK and DEF." effect and the "If it attacks, it gains ATK equal to half the ATK of the attack target, during damage calculation only." effect overlap. For example if 2 copies of "Metalmorph" are equipped on the same monster then that monster gains 600 ATK, and when it attacks an opponent's monster, it gains ATK equal to half the ATK of the opponent's monster twice.: If multiple "Metalmorph" are equipped to 1 monster does their effects overlap?

Mentions in Other Rulings

Fake Feather: If you activate "Fake Feather" and target "Blast with Chain" or "Metalmorph", then the effect will resolve, but "Fake Feather" will not remain on the field equipped to the target monster.: When "Fake Feather" targets "Metalmorph", will it be equipped?

Junk Collector: You cannot activate the effect of "Junk Collector" by banishing cards like "Metalmorph" or "Blast with Chain". You can activate the effect by banishing "Kunai with Chain", but you can only apply the effect which changes an attacking monster to Defense Position when an opponent's monster declares an attack. You cannot apply the effect which equips it to a monster on your side of the field.: Can the effect of "Junk Collector" be activated by banishing a card like "Kunai with Chain"?

Reverse Trap: If the effect of "Reverse Trap" is being applied, the "It gains 300 ATK and DEF." effect of "Metalmorph", reduces 300 ATK and DEF instead. Also, the "If it attacks, it gains ATK equal to half the ATK of the attack target, during damage calculation only." effect, reduces ATK equal to half the ATK of the attack target instead.: If the effect of "Reverse Trap" is being applied, how does the effect of "Metalmorph" that increases ATK by half the ATK of the opponent's monster resolve?

Vylon Epsilon: You can send to the Graveyard a Trap Card like "Metalmorph" that is equipped to "Vylon Epsilon" to activate its effect. You can send to the Graveyard an opponent's Equip Spell Card that is equipped to "Vylon Epsilon

Previously Official Rulings

If you equip a monster with 2 or more copies of "Metalmorph", the effect of each copy of "Metalmorph" is applied. For example, if you equip 2 "Metalmorph" onto a monster it will gain 600 ATK and DEF and when the equipped monster attacks your opponent's monster its ATK will be increased further by the effect of each "Metalmorph".

The additional ATK gained when your equipped monster attacks your opponent's monster is applied when you attack a face-up or face-down monster. This effect does not target.

If you have a Warrior-Type monster equipped with "Metalmorph" and it attacks your opponent's "Cipher Soldier", the effect of "Cipher Soldier" is resolved first. The monster equipped with "Metalmorph" will gain ATK equal to half of "Cipher Soldier's" total ATK.

If your monster that is equipped with "Metalmorph" attacks your opponent's "Injection Fairy Lily", if your opponent activates "Injection Fairy Lily's" effect it will be resolved first, and then after "Injection Fairy Lily's" ATK is increased by 3000 your monster will gain additional ATK equal to half of "Injection Fairy Lily's" total ATK.

If your monster that is equipped with "Metalmorph" attacks your opponent's "Elemental Hero Wildheart", your monster will still gain additional ATK because "Metalmorph" does not affect the monsteryou monster that is equipped with "Metalmorph" attacks your opponent's "The Wicked Avatar", first you will apply the additional gained ATK based on the current ATK of "The Wicked Avatar", and then if your equipped monster becomes the monster with the highest ATK on the field, the ATK of "The Wicked Avatar" will be recalculated.
Example: Player A has "Cannon Soldier" equipped with "Metalmorph" (1400 + 300 = 1700 ATK). "Cannon Soldier" is the monster with the highest ATK on the field, so "The Wicked Avatar" has 1800 ATK (1700 + 100 = 1800 ATK). When "Cannon Soldier" attacks "The Wicked Avatar", the additional ATK is applied, giving "Cannon Soldier" a total of 2600 ATK (1800/2 + 1700 = 2600). "The Wicked Avatar's" ATK is then recalculated to 2700 (2600 + 100 = 2700) and damage is calculated. Player A's "Cannon Soldier" is destroyed and Player A takes 100 points of Battle Damage.

Mentions in Other Rulings

Amplifier"Jinzo with Amplifier", your Trap Cards are not negated and their effects are applied, including "Metalmorph"

Gearfried the Swordmaster:" The effect of "Gearfried the Swordmaster" will activate even if a Trap Card is equipped to him (such as "Metalmorph"

Red-Eyes Black Metal Dragon:" If you have a "Red-Eyes Black Dragon" equipped with "Metalmorph" and your opponent activates "Prohibition" and declares "Red-Eyes Black Metal Dragon", you cannot Tribute the "Red-Eyes Black Dragon" to Special Summon "Red-Eyes Black Metal Dragon".

Reflect Bounder:" Effects such as "Metalmorph"happen after "Reflect Bounder"s effect, because "Reflect Bounder"s effect happens before damage calculation.

Out of Date

If "Reverse Trap" is activated, the increase of 300 ATK and DEF is changed into a decrease of 300 ATK and DEF. When your monster that is equipped with "Metalmorph" attacks your opponent's monster, the additional gained ATK, that is based on the ATK of the monster being attacked, is NOT changed to a decrease.The latest prints of "Metalmorph" and "Reverse Trap" have Problem-Solving Card Text that do not explicitly allow this interaction.